Datasheet

ADC1010S_SER All information provided in this document is subject to legal disclaimers. © NXP B.V. 2010. All rights reserved.
Product data sheet Rev. 2 — 28 December 2010 18 of 39
NXP Semiconductors
ADC1010S series
Single 10-bit ADC; CMOS or LVDS DDR digital outputs
11.3 System reference and power management
11.3.1 Internal/external references
The ADC1010S has a stable and accurate built-in internal reference voltage to adjust the
ADC full-scale. This reference voltage can be set internally via SPI or with pins VREF and
SENSE (programmable in 1 dB steps between 0 dB and −6 dB via control bits
INTREF[2:0] when bit INTREF_EN = logic 1; see Table 22
). See Figure 21 to Figure 24.
The equivalent reference circuit is shown in Figure 20
. An external reference is also
possible by providing a voltage on pin VREF as described in Figure 23
.
Fig 19. Dual transformer configuration suitable for a high intermediate frequency
application
005aaa04
5
100 nF100 nF
100 nF
100 nF
12 Ω
12 Ω
8.2 pF
INP
INM
VCM
50 Ω
50 Ω
50 Ω
50 Ω
ADT1-1WTADT1-1WT
analog
input